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Calendar of Physics Talks Vienna
| The swampland at a large number of space-time dimensions |
| Speaker: | Dieter Luest (LMU Munich) |
| Abstract: | In this talk we discuss some aspects of swampland constraints -
especially the swampland distance conjecture - in a large number of space-time dimensions D.
We analyze Kaluza-Klein (KK) states at large D and find that some KK spectra possess an interesting dependence on D.
On the basis of these observations we propose a new large dimension conjecture.
We apply it to KK states of compactifications to anti-de Sitter backgrounds where it predicts an upper bound on the dimension of space-time as a function of its characteristic radius. |
| Date: | Tue, 08.06.2021 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | https://tuwien.zoom.us/j/95482849369?pwd=SkU2WU5hMVJBQWsyVlFXRlRvQlIvdz09 |
| Contact: | Céline Zwikel |
| Recoil-sensitive angularity distributions using SCET |
| Speaker: | Ankita Budhraja (Tata Institute of Fundamental Research, Mumbai) |
| Abstract: | Angularities are a class of event shapes whose sensitivity to the splitting angle of a collinear emission is controlled by a continuous parameter b,with b > -1 for infrared safety.When measured with respect to the standard thrust axis,this class of QCD observables is a generalization to the well-known thrust(b = 1)and jet broadening(b = 0).For b larger than 1(thrust-like angularities),angularities are insensitive to the recoil of soft against collinear radiation while for b close to 0 (broadening-like angularities),this effect cannot be ignored.In the literature,SCET_I has been successfully applied for thrust-like angularity distributions while the jet broadening distribution has been worked out using SCET_II.I will illustrate a novel framework based on SCET_II that can be applied for the whole range of angularity exponents, thereby allowing us to smoothly connect the special limits .... |
| Date: | Tue, 08.06.2021 |
| Time: | 16:00 |
| Duration: | 60 min |
| Location: | https://univienna.zoom.us/j/93104933847?pwd=N0FrL0E1UHlkQWRhQTlQODVkZ3kvUT09 Meeting ID: 931 0493 3847 Passcode: 674625 |
| Contact: | A. Hoang, P. Stoffer |
| Axion dark matter search with the RADES detector at the CERN Axion Solar Telescope |
| Speaker: | Sergio Arguedas (CERN) |
| Abstract: | Cosmological and astrophysical observations predict that around 84% of the universe's matter content is made of dark matter. The nature of dark matter is currently unknown, and much effort is devoted in the hunt for dark matter. One of the candidates for dark matter is the axion, a particle first introduced to solve the strong Charge-Parity problem of the Standard Model.
The CERN axion solar telescope (CAST) colaboration uses a decommissioned LHC dipole magnet to conduct axion searches. In the presence of...
[for full abstract please visit: https://indico.smi.oeaw.ac.at/event/394/] |
| Date: | Wed, 09.06.2021 |
| Time: | 16:30 |
| Duration: | 60 min |
| Location: | Webinar: request zoom link before 12:00 9Jun2021 via email martin.simon at oeaw.ac.at |
| Contact: | Prof. Dr. Eberhard Widmann, Dr. Martin Simon |
| On the black hole stability problem |
| Speaker: | Jeremie Szeftel (Paris) |
| Abstract: | joint Relativity-Geometric Analysis seminar: I will introduce the celebrated Kerr black hole stability conjecture according to which the Kerr family of metrics are stable as solutions to the Einstein vacuum equations of general relativity.
I will then focus on recent developments concerning this problem.
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| Date: | Thu, 10.06.2021 |
| Time: | 15:00 |
| Duration: | 60 min |
| Location: | https://univienna.zoom.us/j/6540036841?pwd=SytyVkZJZzNyRG9lMm13ejlHeHRRUT09 |
| Contact: | Piotr Chrusciel, Andy Cap, Roland Donninger, Michael Eichmair |
| Light Fermions and the Swampland |
| Speaker: | Irene Valenzuela (Harvard) |
| Abstract: | Quantum gravity can have important implications for Particle Physics and Cosmology. We consider constraints on D-dimensional theories in Minkowski, dS and AdS backgrounds in the light of AdS swampland conjectures as applied to their compactication in a circle. In particular, we consider the non-SUSY AdS instability conjecture and the AdS distance conjecture. For Minkowski and dS vacua the results may be summarized by a light fermion conjecture which states that in theories with a positive first non-vanishing supertrace $(-1)^{k+1}Str(M^{2k}) > 0$, a surplus of light fermions with mass $m_f < \Lambda_D^{1/D}$ must be present, where $\Lambda_D$ is the cosmological constant. The case of AdS can be made consistent with the mild but not the strong version of the AdS Distance conjecture. I will also apply the above constraints to the Standard Model of particle physics, obtaining that it would |
| Date: | Thu, 10.06.2021 |
| Time: | 16:30 |
| Duration: | 60 min |
| Location: | https://tuwien.zoom.us/j/95482849369?pwd=SkU2WU5hMVJBQWsyVlFXRlRvQlIvdz09 |
| Contact: | Laura Donnay, Niccolo Cribiori, David Andriot |
| Black boxes in space and time: semi-device-independent information processing via representation theory |
| Speaker: | Markus Müller (IQOQI Wien, ÖAW) |
| Abstract: | Modelling quantum systems as black boxes allows us to perform information-theoretic tasks without the need to trust the devices or even quantum mechanics. In many experimentally relevant situations, however, the boxes’ inputs or outputs correspond to spatiotemporal quantities like angles, time durations, or field directions, and the question arises how black box statistics can in principle “fit into space and time”. Here, I present a general framework [1] that admits to study this question with or without assuming the validity of quantum mechanics (QM). I present some preliminary results showing that assumptions on the devices’ response to spatiotemporal symmetries can significantly constrain the possible correlations. On the one hand, this leads to an exact classification of the (2,2,2) quantum Bell correlations, and on the other hand, it leads to novel protocols for witnessing Bell non |
| Date: | Fri, 11.06.2021 |
| Time: | 10:00 |
| Duration: | 45 min |
| Location: | on-line |
| Contact: | Marcus Huber |
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